
"""simple docstring"""


def    _snake_case					(		snake_case__ :  int  ):
	if number < 0:
		raise ValueError('number must not be negative'  )
	return number & (number - 1) == 0


if __name__ == "__main__":
		import doctest

		doctest.testmod()

def 							A__       (    lowerCamelCase = 4_00_00_00    )	->						int:
				UpperCamelCase_:				Dict						=    []
				UpperCamelCase_, UpperCamelCase_:				Optional[int]						=    0, 1
				while b <= n:
								if b % 2 == 0:
												even_fibs.append(lowerCamelCase    )
								UpperCamelCase_, UpperCamelCase_:				int						=    b, a + b
				return sum(lowerCamelCase    )


if __name__ == "__main__":
							print(F"""{solution() = }""")






